Photoshop CC 2015: Not opening or creating files.

It started a while ago, almost out of nowhere. I think updating my graphics card did it, but I can't be sure. Tried Reinstalling my gpu's drivers, deleting prefs via Ctrl+Alt+Shift, resetting workspaces, launching with Administrator privileges... nothing has worked thus far. Both the open file dialog and new document window pop up, but as soon as I hit open or OK, nothing happens.

Something is still wrong with your system -- and the 64 bit version is needed to use more than 3 Gig of your system RAM. So you can work temporarily in the 32 bit version, but you still need to figure out what utility or setting is causing problems for the 64 bit version of Photoshop on your system.

What would be the best way to go about figuring out which application is causing issues? I've tried closing each open app, one at a time, and restarting photoshop to check for a difference. Is there a list of known conflicting programs?